So truthfully, while towing or hauling I found the Rhino Storm knock-offs to ride better. I actually liked them. They probably won't hold up to HUGE loads as well as the Timbren, but then again these are 7,300 lb. max GVWR trucks so it's not like we're going to put 4,000 lbs. of weight on the rear axle. I think that between the two, perhaps I'd go with the knock-offs. Less money, better ride, still supports a load better than stock.
Having said that, the Timbrens haven't been horrible. They jar the truck when I hit a bridge expansion joint that's rough, or a bad pot hole. If I put light weight in the truck, such as the 600 lb. tractor implement I hauled a few days ago, it causes the truck to ride rough because the rubber springs aren't resting on the perch but they are closer to it. But otherwise, the truck rides like stock. And if I put my 8,000 lb. trailer on the hitch the truck stays level and rides like a dream. I love them. Zero maintenance, zero worries, zero bars and chains to fool with.